[embedded] Add a test checking the dependencies of Embedded Concurrency runtime

Author: kubamracek

stdlib/public/Concurrency/TaskAlloc.cpp

@@ -40,11 +40,16 @@ static TaskAllocator &allocator(AsyncTask *task) {
   if (task)
     return task->Private.get().Allocator;
 
+#if !SWIFT_CONCURRENCY_EMBEDDED
   // FIXME: this fall-back shouldn't be necessary, but it's useful
   // for now, since the current execution tests aren't setting up a task
   // properly.
   static GlobalAllocator global;
   return global.allocator;
+#else
+  fprintf(stderr, "global allocator fallback not available\n");
+  abort();
+#endif
 }
 
 void *swift::swift_task_alloc(size_t size) {

test/embedded/dependencies-concurrency.swift

@@ -0,0 +1,89 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-swift-frontend -target %target-cpu-apple-macos14 -disable-availability-checking -parse-as-library -enable-experimental-feature Embedded %s -c -o %t/a.o
+// RUN: %target-clang %t/a.o -o %t/a.out %swift_obj_root/lib/swift/embedded/%target-cpu-apple-macos/libswift_Concurrency.a -dead_strip
+
+// RUN: grep DEP\: %s | sed 's#// DEP\: ##' | sort > %t/allowed-dependencies.txt
+
+// RUN: %llvm-nm --undefined-only --format=just-symbols %t/a.out | sort | tee %t/actual-dependencies.txt
+
+// Fail if there is any entry in actual-dependencies.txt that's not in allowed-dependencies.txt
+// RUN: test -z "`comm -13 %t/allowed-dependencies.txt %t/actual-dependencies.txt`"
+
+// DEP: __ZNSt3__111this_thread9sleep_forERKNS_6chrono8durationIxNS_5ratioILl1ELl1000000000EEEEE
+// DEP: __ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6appendEPKc
+// DEP: __ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6appendEPKcm
+// DEP: __ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6insertEmPKc
+// DEP: __ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEED1Ev
+// DEP: __ZNSt3__16chrono12steady_clock3nowEv
+// DEP: __ZNSt3__19to_stringEj
+// DEP: __ZNSt3__19to_stringEy
+// DEP: __ZdlPv
+// DEP: __Znwm
+// DEP: ___assert_rtn
+// DEP: ___stack_chk_fail
+// DEP: ___stack_chk_guard
+// DEP: ___stderrp
+// DEP: _abort
+// DEP: _asl_log
+// DEP: _exit
+// DEP: _fprintf
+// DEP: _free
+// DEP: _malloc
+// DEP: _memcpy
+// DEP: _memset_s
+// DEP: _os_unfair_lock_lock
+// DEP: _os_unfair_lock_unlock
+// DEP: _posix_memalign
+// DEP: _pthread_equal
+// DEP: _pthread_getspecific
+// DEP: _pthread_self
+// DEP: _pthread_setspecific
+// DEP: _putchar
+// DEP: _strlen
+// DEP: _vfprintf
+// DEP: _vsnprintf
+// DEP: _write
+// DEP: dyld_stub_binder
+
+// RUN: %target-run %t/a.out | %FileCheck %s
+
+// REQUIRES: swift_in_compiler
+// REQUIRES: executable_test
+// REQUIRES: optimized_stdlib
+// REQUIRES: OS=macosx
+
+import _Concurrency
+
+public func test() async -> Int {
+  print("test")
+  let t = Task {
+    print("return 42")
+    return 42
+  }
+  print("await")
+  let v = await t.value
+  print("return")
+  return v
+}
+
+@main
+struct Main {
+  static func main() async {
+    print("main")
+    // CHECK: main
+    let t = Task {
+      print("task")
+      let x = await test()
+      print(x == 42 ? "42" : "???")
+    }
+    print("after task")
+    await t.value
+    // CHECK-NEXT: after task
+    // CHECK-NEXT: task
+    // CHECK-NEXT: test
+    // CHECK-NEXT: await
+    // CHECK-NEXT: return 42
+    // CHECK-NEXT: return
+    // CHECK-NEXT: 42
+  }
+}